Improvement in machines for cutting leather



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HORACE BKER, Oliw PAWTUOKET, RHODE ISLAND.

Letters Patent No. 111,900, dated February 21, 1871.

IMPROVEMENT INy MACHINES ron cTriNc LEATHER.

The Schedule referred to in these Letters Patent and making part of the lame.

To all whom 'it may concern? B e it known that L Hormonv Z. BAKER, ofPaw Machine for Cutting Leather; and I do hereby de clare the-following to be a full, clear, and exact description of the same, reference being had to the accompanying drawing making a part `of this specification, in whichl Figure 1 is a side elevation, and Figure 2 is a transverse vertical section, and Figure 3 a top view. This linvention has for its object the cutting of leather' from sides or other large pieces into small pieces or strips for belting and other purposes; and

lt relates to a machine in which a pair of parallel rolls is employed, one having a circumferential cuttingflange or knife, and the other a circumferential groove, the former of which tits int-o the latter, the function of said knife and groove being to out olf from a piece .of leather that part of the same that is passed be tween the rollers and travels through the groove under the knife. y

Referring to the drawinga is a bed-plate, of suitable dimensions, from the ends of which rise standards c c.

l is a shaft mounted in the standards cnc', parallel with the bed-plate, extending beyond the standard c', and bearing on its projecting portion a fast-pulley, e, for the driving-belt, and a loose-pulley, f, upon which to shift the belt when the shaft d is required to be stopped.

g is a bent .rail secured to and connecting the tops of the standards c c'.

is a second shaft mounted in the standards c c', and parallel with the' shaft d.

la L` are rolls loosely placed on the shafts d t, and furnished with splines that enter longitudinal grooves in the shafts, by which construction the rolls are made to revolve when the shafts turn, the latter being geared together. The rolls are fitted with screws in such manner that they maybe moved lengthwise along the shafts.

On one of the rolls is a peripherical flange, l, and in a corresponding location on the other roll is a peripherical groove, m, into which the flange Z enters, the ilange and groove serving to connect the two rolls so that they move together and always preserve the same relative position.

On the other end of the npper-roll is anannular knife, n, which enters a groove, o, formed in the lower roll, to receive it. i

.A gange,vp, is secured to the bed-plate. by the side of the rolls. -The side of the leather olif which the strip is to becnt is to be placed against the gauge p, and its frontto be pressed against the'knife n, by which it is .immediately out. As the leather is fed the strip that is cut off pa ases between the rolls, its width being determined by moving the knife and rolls toward or from the gauge by means cfa screw, s, working through the arm .l of the frame 1v 2 3, which embraces the roll k'. Y

The leather is guided in its progress by the gauge, and is fed .to the rollers over an inclined plane.

rlhe upper shaft is held down 'by springs placed above its journals within the standardsA c c', which springs enable the upper roll to yield enough to accommodate' any thickness of leather,`the compressibility of the springs being gverned by set-screws r, which pass through the tops of the box and standard and bear up'on the'upper ends of the springs.

IThe foregoing arrangement is adapted only tofcntting stil leather. Soft leather, if pressed against the' A annularknife, would sink into the groove o, and wrinkle and refuse to pass through. Accordingly, for cutting soft leather, the annular knife is dispensed with, and in its stead an upright knife, s, is fixed in a. block, t, placed so as to slide between rails u that4 are attached to the standards in front of the rollsl the latter, in this case, being brought near enough together to answerasdrawng-rolls to draw the leather against the knife. v 4

. Having thus described my invention,

What I claim. as new, and desire to secure by Let- 1. v'lheconibination of the longitudinally-sliding rolls It It', the former, provided with the circular knife fn, and tongue l, and the latter with grooves o Im., into which theknife and tongue work, all as and for the purpose specified.

2. The combination of the rolls ,lt Zt', knife n, and groove o, with-the adj nsting-screw` s and frame l 2 3, as and for the purpose specified.

HORACE Z. BAKER.

Witnesses:

BYRON It. Jonsson, C. C. Havens. 

